remove old unused functions

src/tools/StringUtils.cpp

@@ -17,55 +17,6 @@ const std::string getFilenameExtension(std::string const& fileName) {
     return "";
 }
 
-/**
- * get an document from a url
- * @param url url string
- * @return '' or a string with the found document
- */
-const std::string getDocumentFromURL(const std::string &url) {
-    int slashes = 0;
-    for (unsigned int i = 0; i < url.length(); i++) {
-        if (url[i] == '/') {
-            slashes++;
-            if (slashes == 3) {
-                return url.substr(i, url.length() - i);
-            }
-        }
-    }
-    return "";
-}
-
-/**
- * get host from a url
- * @param url url string
- * @return '' or a string with the found host
- */
-const std::string getHostFromURL(const std::string &url) {
-    auto colonDoubleSlash = url.find("://");
-    if (colonDoubleSlash != std::string::npos) {
-        auto startPos = colonDoubleSlash + 3;
-        auto thirdSlash = url.find("/", startPos);
-        if (thirdSlash == std::string::npos) {
-            return url.substr(startPos);
-        }
-        return url.substr(startPos, thirdSlash - startPos);
-    }
-    return "";
-}
-
-/**
- * get scheme from a url
- * @param url url string
- * @return '' or a string with the found protocol
- */
-const std::string getSchemeFromURL(const std::string &url) {
-    auto colonDoubleSlash = url.find("://");
-    if (colonDoubleSlash != std::string::npos) {
-        return url.substr(0, colonDoubleSlash);
-    }
-    return "";
-}
-
 /**
  * convert string to lowercase
  * @param str string